Surface plasmon coupling to nanoscale Schottky-type electrical detectors

Dufaux, Thomas; Dorfmüller, Jens; Vogelgesang, Ralf; Burghard, Marko; Kern, Klaus

doi:10.1063/1.3503534

Cited by 24 publications

(20 citation statements)

References 25 publications

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“…Coupling photodetector devices with plasmonic nanostructures may effectively convert local enhancement effect into electric signal processing and thus facilitate the design of surface plasmon resonance based optoelectronic devices. Dufaux et al investigated the near field coupling of surface plasmons to a Ti/CdS nanowire Schottky contact. The presented Schottky type devices with individual CdS nanowire were beneficial for local electrical detection for surface plasmon polaritons.…”

Section: New Concepts In Cds Nanoscale Photodetector Designmentioning

confidence: 99%

CdS Nanoscale Photodetectors

2014

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CdS nanostructures have received much attention in recent years as building blocks for optoelectronic devices due to their unique physical and chemical properties. This progress report provides an overview of recent research about rational design of CdS nanoscale photodetectors. Three kinds of photodetectors according to the metal-semiconductor contact types are discussed in detail: Ohmic contact, Schottky contact, and field enhanced transistor configuration. The focus is on the tuning of optical and electrical properties CdS nanostructures by element doping, composition and bandgap engineering, and heterojunction integration, along with thus modified device performances generated during these tuning processes. Latest concepts of photodetector design such as flexible, self-powered, plasmonic, and piezophototronic photodetectors with novel properties are introduced to demonstrate the future directions of such an exciting research field.

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Section: New Concepts In Cds Nanoscale Photodetector Designmentioning

confidence: 99%

CdS Nanoscale Photodetectors

2014

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“…SPP waveguides can be implemented as SPP detectors . Approaches consist of replacing one or both insulator regions (I) with a semiconductor medium, either inorganic or polymeric.…”

Section: Waveguide Detectorsmentioning

confidence: 99%

“…Other motivating factors include a desire to increase the absorptance of photodetectors, shrink their dimensions, or enhance the detection process (IPE, EHP) by exploiting enhanced or localised guided fields. SPP waveguide detectors based on absorption in organics (EHP) , semiconductors (EHP) and metals (IPE) have been reported. Thermal , photo‐assisted transport and tunneling have also been used as SPP detection mechanisms.…”

Section: Waveguide Detectorsmentioning

confidence: 99%

Surface plasmon photodetectors and their applications

Berini

2013

Laser & Photonics Reviews

201

155

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Surface plasmon photodetectors are of vigorous current interest. Such detectors typically combine a metallic structure that supports surface plasmons with a photodetection structure based on internal photoemission or electron-hole pair creation. Detector architectures are highly varied, involving surface plasmons on planar metal waveguides, on metal gratings, on nano-particles, -islands, or -antennas, or involving plasmonmediated transmission through one or many sub-wavelength holes in a metal film. Properties inherent to surface plasmons, such as sub-wavelength confinement and their ability to resonate on tiny metallic structures, are exploited to convey useful characteristics to detectors in addressing applications such as low-noise high-speed detection, single-plasmon detection, near-and mid-infrared imaging, photovoltaic solar energy conversion, and (bio)chemical sensing. The operating principles behind surface plasmon detectors are reviewed, the literature on the topic is surveyed, and avenues that appear promising are highlighted.tection materials that are available. Properties inherent to SPPs are exploited to convey useful characteristics to detectors, such as polarisation, angular or spectral selectivity, or to improve their performance in terms of photoresponse, signal-to-noise or speed. The use of SPPs can also lead to small detectors, having dimensions comparable to those of highly integrated electronic elements. Several applications are targeted including low-noise or high-speed detection, single-plasmon detection, near-and mid-infrared imaging, photovoltaic solar energy conversion, and (bio)chemical sensing.Progress on SPP detectors has been rapid, and interest on the topic is vigorous, prompting a review of this area (no review of SPP detectors currently exists in the literature). The objectives of this review are to describe the operating principles behind SPP detectors, summarise the literature, and highlight avenues that appear promising. The properties of propagating SPPs and general photodetection principles are discussed initially, followed by a review of the literature organised by detector type (then chronologically), beginning with prism-and grating-coupled detectors, followed by hole-coupled detectors, then by detectors involving nanoparticles and nanoantennas, and closing with waveguide detectors. Some detectors could be classified under more than one type (e.g., nanoantennas or nanoparticles); classification was based on what seemed to be the best fit. Although not exhaustive, the review is comprehensive and covers the breadth of the field. Avenues that C 2013 by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim LASER & PHOTONICS REVIEWS 198 P. Berini: Surface plasmon detectors appear promising in terms of performance and application are highlighted throughout the paper and summarised in the last section. NotationAn e +jωt time-harmonic dependence is assumed throughout this paper. The relative permittivity is denoted ε r , and is written for a metal in terms of real and imaginary parts as ε r,...

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“…Electrical detection of surface plasmons is important in the development of advanced active plasmonic devices. A variety of plasmonic detectors have been studied: surface plasmons propagating in a plasmonic device or circuit may be detected electrically, for example by inducing local changes in the resistivity of a superconducting nanowire to detect single plasmons [27], or detecting propagating surface plasmons at the Schottky contact of a semiconductor nanowire with a metal strip [28]. Coupling between a waveguide and an integrated plasmonic semiconductor-based detector allows detection of the propagating plasmons [29].…”

Section: Introductionmentioning

confidence: 99%

Photocurrent enhancement of graphene photodetectors by photon tunneling of light into surface plasmons

Maleki

Cumming

et al. 2017

J. Opt.

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We demonstrate that surface plasmon resonances excited by photon tunneling through an adjacent dielectric medium enhance photocurrent detected by a graphene photodetector. The device is created by overlaying a graphene sheet over an etched gap in a gold film deposited on glass. The detected photocurrents are compared for five different excitation wavelengths, ranging from 0 570   nm to 0 730   nm. The photocurrent excited with incident p-polarized light (the case for resonant surface plasmon excitation) is significantly amplified in comparison with that for s-polarized light (without surface plasmon resonances). We observe that the photocurrent is greater for shorter wavelengths (for both and -polarizations) due to the increased photothermal current resulting from higher damping of surface plasmons at shorter wavelength excitation. Position-dependent Raman spectroscopic analysis of the optically-excited graphene photodetector indicates the presence of charge carriers near the metallic edge. In addition, we show that the polarity of photocurrent switches across the gap as the incident light spot moves across the gap. Graphene-based photodetectors offer a simple architecture which can be fabricated on dielectric waveguides to exploit the plasmonic photocurrent enhancement of the evanescent field for detection. Applications for these devices include photo-detection, optical sensing and direct plasmonic detection.

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Surface plasmon coupling to nanoscale Schottky-type electrical detectors

Cited by 24 publications

References 25 publications

CdS Nanoscale Photodetectors

CdS Nanoscale Photodetectors

Surface plasmon photodetectors and their applications

Photocurrent enhancement of graphene photodetectors by photon tunneling of light into surface plasmons

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